Journal
OPTICAL AND QUANTUM ELECTRONICS
Volume 47, Issue 4, Pages 865-872Publisher
SPRINGER
DOI: 10.1007/s11082-014-0016-y
Keywords
Quantum well; Stark effect; Intersubband absorption; Tunable photodetectors; Genetic algorithm
Funding
- MPNS COST ACTION [MP1204 - TERA-MIR]
- BMBS COST Action - European Network for Skin Cancer Detection using Laser Imaging [BM1205]
- Ministry of Education, Science and Technological Development (Republic of Serbia) [III 45010]
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We propose a method which delivers optimal cubic GaN/AlGaN quantum well profiles such that both the Stark effect and peak intersubband absorption from the ground to the first excited electronic state, in a prescribed range of bias electric fields, are maximized. Our method relies on the Genetic Algorithm which finds globally optimal structures with a predefined number of embedded layers. We investigate simple rectangular quantum wells with embedded step layers for applications in tunable mid-infrared photodetectors. The effects of band nonparabolicity are taken into account to refine our model.
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